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PDN SAE GW selection method, system and device in SAE

A service system and parameter selection technology, applied in the field of communication, can solve problems such as failure to detect whether the PDN SAEGW status is normal, failure, and no signaling interaction

Active Publication Date: 2008-10-22
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 1. After the separation of the control plane and the user plane in SAE, in the process of establishing the bearer, if the MME selects Serving SAE GW and PDN SAE GW as two different physical devices, there is no connection between the MME and the selected PDN SAE GW. Signaling interaction, so the MME cannot detect whether the current state of a selected PDN SAE GW is normal. If the MME happens to select a PDN SAE GW with an abnormal state, it will notify the Serving SAE GW (even if there are other PDNs with a normal state at this time) SAE GW), the Serving SAE GW will still try to establish a bearer with the PDN SAE GW, and cannot continue to try to establish a bearer with other PDN SAEGWs if the bearer establishment with the PDN SAE GW fails, then the entire bearer establishment process will fail

Method used

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  • PDN SAE GW selection method, system and device in SAE

Examples

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Embodiment 1

[0059] Embodiment 1: In this embodiment, SAE GW A is a device that integrates Serving SAE GW and PDN SAEGW. MME selects SAE GW A as Serving SAE GW for bearer establishment, and the PDN SAE GW entity of SAE GWA itself can also support The bearer uses the APN, so SAEGW A chooses itself as the PDN SAE GW to establish the bearer. see Figure 5 shown, including the following steps:

[0060] 201. In the process of establishing the bearer, the MME selects the SAE GWA as the Serving SAEGW for establishing the bearer, and sends it a bearer establishment request message, which only carries the APN.

[0061] 202. After receiving the bearer establishment request message sent by the MME, SAE GW A finds that the message only carries the APN, and then further judges that it has the function of PDN SAE GW, and its own PDN SAE GW can handle the APN, so directly Select its own PDN SAE GW to establish a bearer, and respond to the MME with a bearer establishment response message.

Embodiment 2

[0062] Embodiment 2: In this embodiment, SAE GW A is a device that integrates Serving SAE GW and PDN SAE GW, and SAE GW B is also a device that integrates Serving SAE GW and PDN SAE GW. MME selects SAE GW A as Establish the Serving SAE GW for the bearer, but the PDN SAE GW entity of SAEGW A itself cannot support the APN used by the bearer, so the SAE GWA obtains the list of available PDN SAE GW control plane IP addresses according to the analysis APN, and selects the SAE from it according to the policy GW B serves as the PDN SAE GW that establishes the bearer. see Figure 6 shown, including the following steps:

[0063] 301. In the bearer establishment process, the MME selects SAE GW A as the Serving SAE GW, and sends a bearer establishment request message to it, and the message carries an APN.

[0064]302. After receiving the Bearer Establishment Request message sent by the MME, SAE GW A finds that the message only carries the APN, and further judges that although it has th...

Embodiment 3

[0067] Embodiment 3: In this embodiment, Serving SAE GW A is a single Serving SAE GW entity, and PDN SAE GW B is a single PDN SAE GW entity. The MME selects the Serving SAE GWA as the serving SAE GW to establish the bearer. Since the Serving SAE GWA itself does not support the function of the PDN SAE GW, the Serving SAE GW A analyzes the APN to obtain the list of available PDN SAE GW control plane IP addresses, and selects the PDN from it. SAE GW B establishes a bearer. see Figure 7 shown, including the following steps:

[0068] 401. In the bearer establishment process, the MME selects the Serving SAE GW A as the Serving SAEGW, and sends a bearer establishment request message to it, and the message carries an APN.

[0069] 402. After receiving the bearer establishment request message sent by the MME, Serving SAE GW A finds that the message only carries the APN, then further judges that it does not support the PDN SAE GW function, and then performs DNS analysis on the APN to...

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PUM

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Abstract

The invention discloses a method, a system and a device for selecting a PDN SAE GW in an SAE, which are to improve the probability for selecting the PDN SAE GW with normal state. The method comprises the following steps that: in the flow for establishing load bearing, a mobility management entity MME selects a service system architecture evolution gateway entity Serving SAE GW; and the Serving SAE GW selected by the MME selects a package data network system architecture evolution gateway entity PDN SAE GW. The system comprises the MME, the Serving SAE GW and the PDN SAE GW, wherein, the MME is used for selecting the Serving SAE GW in the flow for establishing the load bearing and the Serving SAE GW is used for selecting the PDN SAE GW.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, a system and a device for selecting a PDN SAE GW in an SAE. Background technique [0002] In order to enhance the competitiveness of future networks, 3GPP is studying a new evolved network. For its system architecture, see figure 1 As shown, the logical entities include the Evolved UMTS Terrestrial Radio Access Network (EUTRAN, Evolved UMTS Terrestrial Radio Access Network), which is used to implement all functions related to the wireless network of the evolution; the Mobility Management Entity (MME, Mobility ManagementEntity), Responsible for the mobility management of the control plane, including user context and mobility state management, assigning user temporary identities, etc., the function is similar to the Serving GPRS Support Node SGSN (Serving GPRS Support Node) control plane of the 3G WCDMA system; the service system architecture evolution gateway entity ( ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/66H04L12/28H04W48/18
Inventor 银宇
Owner HUAWEI TECH CO LTD
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